Question 1

Which one of the following is not one of the postulates of Dalton's atomic theory?

Accepted Answer

A) Atoms are composed of protons, neutrons, and electrons. 
B) All atoms of a given element are identical; the atoms of different elements are different and have different properties. 
C) Atoms of an element are not changed into different types of atoms by chemical reactions: atoms are neither created nor destroyed in chemical reactions. 
D) Compounds are formed when atoms of more than one element combine; a given compound always has the same relative number and kind of atoms. 
E) Each element is composed of extremely small particles called atoms. 
A) Atoms are composed of protons, neutrons, and electrons. 
B) All atoms of a given element are identical; the atoms of different elements are different and have different properties. 
C) Atoms of an element are not changed into different types of atoms by chemical reactions: atoms are neither created nor destroyed in chemical reactions. 
D) Compounds are formed when atoms of more than one element combine; a given compound always has the same relative number and kind of atoms. 
E) Each element is composed of extremely small particles called atoms.

Question 2

The correct formula of iron (III)bromide is ________.

Accepted Answer

A) FeBr2 
B) FeBr3 
C) FeBr 
D) Fe3Br3 
E) Fe3Br 
A) FeBr2 
B) FeBr3 
C) FeBr 
D) Fe3Br3 
E) Fe3Br

Question 3

Iodine forms an ion with a charge of ________.

Accepted Answer

A) 7- 
B) 1+ 
C) 2- 
D) 2+ 
E) 1- 
A) 7- 
B) 1+ 
C) 2- 
D) 2+ 
E) 1-

Question 4

The molecular formula of a compound is always ________ the empirical formula.

Accepted Answer

A) more complex than 
B) different from 
C) an integral multiple of 
D) the same as 
E) simpler than 
A) more complex than 
B) different from 
C) an integral multiple of 
D) the same as 
E) simpler than

Question 5

Which compounds do not have the same empirical formula?

Accepted Answer

A) C2H2, C6H6 
B) CO, CO2 
C) C2H4, C3H6 
D) C2H4O2, C6H12O6 
E) C2H5COOCH3, CH3CHO 
A) C2H2, C6H6 
B) CO, CO2 
C) C2H4, C3H6 
D) C2H4O2, C6H12O6 
E) C2H5COOCH3, CH3CHO

Question 6

Which pair of elements is most apt to form an ionic compound with each other?

Accepted Answer

A) barium, bromine 
B) calcium, sodium 
C) oxygen, fluorine 
D) sulfur, fluorine 
E) nitrogen, hydrogen 
A) barium, bromine 
B) calcium, sodium 
C) oxygen, fluorine 
D) sulfur, fluorine 
E) nitrogen, hydrogen

Question 7

Which type of formula provides the most information about a compound?

Accepted Answer

A) empirical 
B) molecular 
C) simplest 
D) structural 
E) chemical 
A) empirical 
B) molecular 
C) simplest 
D) structural 
E) chemical

Question 8

Which isotope has 36 electrons in an atom?

Accepted Answer

A)    Kr 
B)    Br 
C)    Se 
D)    Cl 
E)    Hg 
A)    Kr 
B)    Br 
C)    Se 
D)    Cl 
E)    Hg

Question 9

Sodium forms an ion with a charge of ________.

Accepted Answer

A) 1+ 
B) 1- 
C) 2+ 
D) 2- 
E) 0 
A) 1+ 
B) 1- 
C) 2+ 
D) 2- 
E) 0

Question 10

Predict the empirical formula of the ionic compound that forms from aluminum and oxygen.

Accepted Answer

A) AlO 
B) Al3O2 
C) Al2O3 
D) AlO2 
E) Al2O 
A) AlO 
B) Al3O2 
C) Al2O3 
D) AlO2 
E) Al2O

Question 11

Which metal forms cations of differing charges?

Accepted Answer

A) K 
B) Cs 
C) Ba 
D) Al 
E) Sn 
A) K 
B) Cs 
C) Ba 
D) Al 
E) Sn

Question 12

Elements in Group 6A are known as the ________.

Accepted Answer

A) alkali metals 
B) chalcogens 
C) alkaline earth metals 
D) halogens 
E) noble gases 
A) alkali metals 
B) chalcogens 
C) alkaline earth metals 
D) halogens 
E) noble gases

Question 13

Which one of the following is the formula of hydrochloric acid?

Accepted Answer

A) HClO3 
B) HClO4 
C) HClO 
D) HCl 
E) HClO2 
A) HClO3 
B) HClO4 
C) HClO 
D) HCl 
E) HClO2

Question 14

What is the formula of the compound formed between strontium ions and nitrogen ions?

Accepted Answer

A) SrN 
B) Sr3N2 
C) Sr2N3 
D) SrN2 
E) SrN3 
A) SrN 
B) Sr3N2 
C) Sr2N3 
D) SrN2 
E) SrN3

Question 15

There are ________ electrons,________ protons,and ________ neutrons in an atom of   Xe.

Accepted Answer

A) 132, 132, 54 
B) 54, 54, 132 
C) 78, 78, 54 
D) 54, 54, 78 
E) 78, 78, 132 
A) 132, 132, 54 
B) 54, 54, 132 
C) 78, 78, 54 
D) 54, 54, 78 
E) 78, 78, 132

Question 16

The name of the ionic compound (NH4)3PO4 is ________.

Accepted Answer

A) ammonium phosphate 
B) nitrogen hydrogen phosphate 
C) tetrammonium phosphate 
D) ammonia phosphide 
E) triammonium phosphate 
A) ammonium phosphate 
B) nitrogen hydrogen phosphate 
C) tetrammonium phosphate 
D) ammonia phosphide 
E) triammonium phosphate

Question 17

Which of the following species contains 18 electrons?

Accepted Answer

A) (31P) 
B) (34S2-) 
C) (36Cl) 
D) (80Br-) 
E) (16O) 
A) (31P) 
B) (34S2-) 
C) (36Cl) 
D) (80Br-) 
E) (16O)

Question 18

An atom of 118Xe contains ________ neutrons.

Accepted Answer

A) 54 
B) 172 
C) 64 
D) 110 
E) 118 
A) 54 
B) 172 
C) 64 
D) 110 
E) 118

Question 19

Fluorine forms an ion with a charge of ________.

Accepted Answer

A) 1- 
B) 1+ 
C) 2+ 
D) 3+ 
E) 3- 
A) 1- 
B) 1+ 
C) 2+ 
D) 3+ 
E) 3-

Question 20

What is the formula for perchloric acid?

Accepted Answer

A) HClO 
B) HClO3 
C) HClO4 
D) HClO2 
E) HCl 
A) HClO 
B) HClO3 
C) HClO4 
D) HClO2 
E) HCl

Exam 2: Atoms, molecules, and Ions

Which one of the following is not one of the postulates of Dalton's atomic theory?

The correct formula of iron (III)bromide is ________.

Iodine forms an ion with a charge of ________.

The molecular formula of a compound is always ________ the empirical formula.

Which compounds do not have the same empirical formula?

Which pair of elements is most apt to form an ionic compound with each other?

Which type of formula provides the most information about a compound?

Which isotope has 36 electrons in an atom?

Sodium forms an ion with a charge of ________.

Predict the empirical formula of the ionic compound that forms from aluminum and oxygen.

Which metal forms cations of differing charges?

Elements in Group 6A are known as the ________.

Which one of the following is the formula of hydrochloric acid?

What is the formula of the compound formed between strontium ions and nitrogen ions?

There are ________ electrons,________ protons,and ________ neutrons in an atom of Xe.

The name of the ionic compound (NH4)3PO4 is ________.

Which of the following species contains 18 electrons?

An atom of 118Xe contains ________ neutrons.

Fluorine forms an ion with a charge of ________.

What is the formula for perchloric acid?

Introduction: Matter, energy, and Measurement

Chemical Reactions and Reaction Stoichiometry

Reactions in Aqueous Solution

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

There are electrons, protons,and neutrons in an atom of Xe.

The name of the ionic compound (NH₄)₃PO₄ is ________.

An atom of ¹¹⁸Xe contains ________ neutrons.